<template>
    <div class="prodetail">
        <!-- 标题 -->
        <van-nav-bar fixed title="商品详情页" left-arrow @click-left="$router.go(-1)" />

        <!-- 轮播图 -->
        <van-swipe @change="onChange">
            <van-swipe-item v-for="(image, index) in images" :key="index">
                <img :src="image.external_url" />
            </van-swipe-item>

            <template #indicator>
                <div class="custom-indicator">
                    {{ current + 1 }} / {{ images.length }}
                </div>
            </template>
        </van-swipe>

        <!-- 商品说明 -->
        <div class="info">
            <div class="title">
                <div class="price">
                    <span class="now">￥{{ detail.goods_price_min }}</span>
                    <span class="oldprice">￥{{ detail.goods_price_max }}</span>
                </div>
                <div class="sellcount">已售{{ detail.goods_sales }}件</div>
            </div>
            <div class="msg text-ellipsis-2">
                {{ detail.goodes_name }}
            </div>

            <div class="service">
                <div class="left-words">
                    <span><van-icon name="passed" />七天无理由退货</span>
                    <span><van-icon name="passed" />48小时发货</span>
                </div>
                <div class="right-icon">
                    <van-icon name="arrow" />
                </div>
            </div>
        </div>

        <!-- 商品评价 -->
        <div class="comment">
            <div class="comment-title">
                <div class="left">商品评价 ({{ total }}条)</div>
                <div class="right">查看更多 <van-icon name="arrow" /> </div>
            </div>
            <div class="comment-list">
                <div class="comment-item" v-for="item in commentList" :key="item.comment_id">
                    <div class="top">
                        <img :src="item.user.avatar_url || defaultImg" alt="">
                        <div class="name">{{ item.user.nick_name }}</div>
                        <van-rate :size="16" :value="5" color="#ffd21e" void-icon="star" void-color="#eee" />
                    </div>
                    <div class="content">
                        {{ item.content }}
                    </div>
                    <div class="time">
                        {{ item.create_time }}
                    </div>
                </div>
            </div>
        </div>

        <!-- 商品描述 -->
        <div class="tips">商品描述</div>
        <div class="desc" v-html="detail.content"></div>

        <!-- 底部 -->
        <div class="footer">
            <div class="icon-home">
                <van-icon name="wap-home-o" />
                <span>首页</span>
            </div>
            <div class="icon-cart">
                <span v-if="cartTotal > 0" class="num">{{ cartTotal }}</span>
                <van-icon name="shopping-cart-o" />
                <span>购物车</span>
            </div>
            <div @click="addFn" class="btn-add">加入购物车</div>
            <div @click="buyNow" class="btn-buy">立刻购买</div>
        </div>
        <!-- 下拉组件 -->
        <van-action-sheet v-model="showPannel" :title="mode === 'cart' ? '加入购物车' : '立刻购买'">
            <div class="product">
                <div class="product-title">
                    <div class="left">
                        <img :src="detail.goods_image" alt="">
                    </div>
                    <div class="right">
                        <div class="price">
                            <span>¥</span>
                            <span class="nowprice">{{ detail.goods_price_min }}</span>
                        </div>
                        <div class="count">
                            <span>库存</span>
                            <span>{{ detail.stock_total }}</span>
                        </div>
                    </div>
                </div>
                <div class="num-box">
                    <span>数量</span>
                    <CountBox v-model="addCount"></CountBox>
                </div>
                <div class="showbtn" v-if="detail.stock_total > 0">
                    <div @click="addCart" class="btn" v-if="mode === 'cart'">加入购物车</div>
                    <div class="btn now" v-if="mode === 'buyNow'">立刻购买</div>
                </div>
                <div class="btn-none" v-else>该商品已抢完</div>
            </div>
        </van-action-sheet>
    </div>
</template>

<script>
import { addCart } from '@/api/cart';
import { getProComments, getProDetail } from '@/api/product';
import defaultImg from '@/assets/default-avatar.png'
import CountBox from '@/components/CountBox.vue';
import loginConfirm from '@/mixins/loginConfirm';

export default {
    data() {
        return {
            images: [],
            current: 0,
            detail: {},
            total: 0,
            commentList: [],
            defaultImg,
            mode: '',
            showPannel: false,
            addCount: 1,
            cartTotal: 0
        }
    },
    mixins: [loginConfirm],
    components: {
        CountBox
    },
    computed: {
        goodsId() {
            return this.$route.params.id
        }
    },
    created() {
        this.getDetail()
        this.getComments()
    },
    methods: {
        onChange(index) {
            this.current = index
        },
        async getDetail() {
            const { data: { detail } } = await getProDetail(this.goodsId)
            this.detail = detail
            this.images = detail.goods_images
        },
        async getComments() {
            const { data: { list, total } } = await getProComments(this.goodsId, 3)
            this.commentList = list
            this.total = total
        },
        addFn() {
            this.mode = 'cart'
            this.showPannel = true
        },
        buyNow() {
            this.mode = 'buyNow'
            this.showPannel = true
        },
        async addCart() {
            //判断用户是否登录
            if (this.loginConfirm()) {
                return
            }

            const { data } = await addCart(this.goodsId, this.addCount, this.detail.skuList[0].goods_sku_id)
            this.cartTotal = data.cartTotal
            this.$toast('加入购物车成功')
            this.showPannel = false
        },
    }
}
</script>

<style lang="less" scoped>
.prodetail {
    padding-top: 46px;

    ::v-deep .van-icon-arrow-left {
        color: #333;
    }

    img {
        display: block;
        width: 100%;
    }

    .custom-indicator {
        position: absolute;
        right: 10px;
        bottom: 10px;
        padding: 5px 10px;
        font-size: 12px;
        background: rgba(0, 0, 0, 0.1);
        border-radius: 15px;
    }

    .desc {
        width: 100%;
        overflow: scroll;

        ::v-deep img {
            display: block;
            width: 100% !important;
        }
    }

    .info {
        padding: 10px;
    }

    .title {
        display: flex;
        justify-content: space-between;

        .now {
            color: #fa2209;
            font-size: 20px;
        }

        .oldprice {
            color: #959595;
            font-size: 16px;
            text-decoration: line-through;
            margin-left: 5px;
        }

        .sellcount {
            color: #959595;
            font-size: 16px;
            position: relative;
            top: 4px;
        }
    }

    .msg {
        font-size: 16px;
        line-height: 24px;
        margin-top: 5px;
    }

    .service {
        display: flex;
        justify-content: space-between;
        line-height: 40px;
        margin-top: 10px;
        font-size: 16px;
        background-color: #fafafa;

        .left-words {
            span {
                margin-right: 10px;
            }

            .van-icon {
                margin-right: 4px;
                color: #fa2209;
            }
        }
    }

    .comment {
        padding: 10px;
    }

    .comment-title {
        display: flex;
        justify-content: space-between;

        .right {
            color: #959595;
        }
    }

    .comment-item {
        font-size: 16px;
        line-height: 30px;

        .top {
            height: 30px;
            display: flex;
            align-items: center;
            margin-top: 20px;

            img {
                width: 20px;
                height: 20px;
            }

            .name {
                margin: 0 10px;
            }
        }

        .time {
            color: #999;
        }
    }

    .footer {
        position: fixed;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 55px;
        background-color: #fff;
        border-top: 1px solid #ccc;
        display: flex;
        justify-content: space-evenly;
        align-items: center;

        .icon-home,
        .icon-cart {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-size: 14px;

            .van-icon {
                font-size: 24px;
            }
        }

        .btn-add,
        .btn-buy {
            height: 36px;
            line-height: 36px;
            width: 120px;
            border-radius: 18px;
            background-color: #ffa900;
            text-align: center;
            color: #fff;
            font-size: 14px;
        }

        .btn-buy {
            background-color: #fe5630;
        }
    }
}

.tips {
    padding: 10px;
}

.product {
    .product-title {
        display: flex;

        .left {
            img {
                width: 90px;
                height: 90px;
            }

            margin: 10px;
        }

        .right {
            flex: 1;
            padding: 10px;

            .price {
                font-size: 14px;
                color: #fe560a;

                .nowprice {
                    font-size: 24px;
                    margin: 0 5px;
                }
            }
        }
    }

    .num-box {
        display: flex;
        justify-content: space-between;
        padding: 10px;
        align-items: center;
    }

    .btn,
    .btn-none {
        height: 40px;
        line-height: 40px;
        margin: 20px;
        border-radius: 20px;
        text-align: center;
        color: rgb(255, 255, 255);
        background-color: rgb(255, 148, 2);
    }

    .btn.now {
        background-color: #fe5630;
    }

    .btn-none {
        background-color: #cccccc;
    }
}

.footer .icon-cart {
  position: relative;
  padding: 0 6px;
  .num {
    z-index: 999;
    position: absolute;
    top: -2px;
    right: 0;
    min-width: 16px;
    padding: 0 4px;
    color: #fff;
    text-align: center;
    background-color: #ee0a24;
    border-radius: 50%;
  }
}
</style>